Don't try this until you have mastered the aysha with the true grip (also known as cup grip or chinese grip). This trick can only be slowed down to a point. It works and looks better when performed fast, with some momentum.Use crash mat and a spotter to guide you during the flip.Some people get this right away others take weeks, even months to get it. If you don't feel safe, dont rush it and don't worry it will "click" someday :)